Addtron firmware upgrade

Hi,

I have bought an Addtron AWA-100 PCMCIA wireless network card.
It came with a PLX based PCI to PCMCIA adaptor card, which I need
as I am putting this into a desktop machine.

The problem is that I need to use this device in Ad-Hoc mode, and
it looks like the firmware needs upgrading to support Ad-Hoc mode.

Unfortunately it looks like Addtron went out of business some time ago.

Does anyone know where to get a firmware upgrade for this device?

Regards

Nick